When a bullying teacher from Katou Kiri's past comes to Kaimei Academy, he harasses the Sket-dan. But will the bully's actions push Student Council member/trained ninja Katou over the edge?
You reject... I'm gonna purge 
the school of all you scum!
Basura,
Seu merda. Eu vou limpar 
essa escola de todo o lixo!